using MainShell.Resources.CustomControl;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;

namespace MainShell.Common
{
    public static class Loading
    {

        private static LoadingWaitView _view;

        // 全局初始化：在主程序启动或插件加载时调用一次
        public static void Initialize(Window mainWindow)
        {
            if (_view != null) return; // 避免重复加载

            _view = new LoadingWaitView();

            // 获取窗口的根内容
            var rootContent = mainWindow.Content;

            if (rootContent is Panel rootPanel)
            {
                // 如果根部本来就是 Panel (Grid/Canvas等)，直接添加
                rootPanel.Children.Add(_view);
            }
            else if (rootContent is ContentControl contentControl)
            {
                // 如果根部是 ContentControl，我们需要把原本的内容包在一个新的 Grid 里
                var originalContent = contentControl.Content as UIElement;
                contentControl.Content = null;

                var wrapperGrid = new Grid();
                wrapperGrid.Children.Add(originalContent); // 原有内容
                wrapperGrid.Children.Add(_view);           // 我们的遮罩层

                contentControl.Content = wrapperGrid;
            }

            // 确保遮罩层铺满并置于顶层
            Grid.SetColumnSpan(_view, 99);
            Grid.SetRowSpan(_view, 99);
            Panel.SetZIndex(_view, 9999);
        }
        // 基础调用：Loading.Show("计算中...");
        public static void Show(string msg, bool isIndeterminate, bool canCancel = true) => LoadingService.Instance.Show(msg, canCancel, isIndeterminate);

        public static void Hide() => LoadingService.Instance.Hide();

        public static void Report(double val) => LoadingService.Instance.Report(val);

        // 获取当前令牌：Loading.Token
        public static CancellationToken Token => LoadingService.Instance.Token;

        // 高级用法：使用 using 块自动开启和关闭
        public static IDisposable Manager(string msg, bool canCancel = true)
        {
            Show(msg, canCancel);
            return new DisposableAction(() => Hide());
        }

        public static async Task<bool> RunAsync(
    Func<CancellationToken, IProgress<double>, Task> work,
    string message,
    bool canCancel = true, bool isIndeterminate = false,
    Action<Exception> onError = null)
        {
            using (Manager(message, canCancel))
            {
                try
                {
                    LoadingService.Instance.Show(message, isIndeterminate, canCancel);
                    var progress = new Progress<double>(val =>
                        Application.Current.Dispatcher.Invoke(() => LoadingService.Instance.ProgressValue = val));

                    await Task.Run(() => work(LoadingService.Instance.Token, progress), LoadingService.Instance.Token);

                    return true; // 执行成功
                }
                catch (OperationCanceledException)
                {
                    // 用户点击了取消，通常不需要弹窗，直接返回 false
                    return false;
                }
                catch (Exception ex)
                {
                    // 捕获其他所有异常（硬件错误、逻辑错误等）
                    if (onError != null)
                        onError(ex);
                    else
                        MessageBox.Show($"操作失败: {ex.Message}", "系统错误", MessageBoxButton.OK, MessageBoxImage.Error);

                    return false;
                }
            }
        }
    }
}